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Finding the Fourth Proportional to 18,640.98, 27,971.19 and 7,555.86

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Solution

The fourth proportional to 18,640.98, 27,971.19 and 7,555.86 is: 11,337.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.98 : 27,971.19 = 7,555.86 : x
  2. Step 2: Convert to fraction form
    18,640.98/27,971.19 = 7,555.86/x
  3. Step 3: Cross multiply
    18,640.98x = 27,971.19 × 7,555.86
  4. Step 4: Simplify right side
    18,640.98x = 211,346,395.67
  5. Step 5: Solve for x
    x = 211,346,395.67/18,640.98
  6. Step 6: Final answer
    x = 11,337.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.